1065243440 has 20 divisors (see below), whose sum is σ = 2476691184. Its totient is φ = 426097344.

The previous prime is 1065243433. The next prime is 1065243467. The reversal of 1065243440 is 443425601.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1065243440² = 2269487172926067200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6657692 + ... + 6657851.

Almost surely, 2^1065243440 is an apocalyptic number.

1065243440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1065243440 is an abundant number, since it is smaller than the sum of its proper divisors (1411447744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1065243440 is a wasteful number, since it uses less digits than its factorization.

1065243440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13315556 (or 13315550 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 1065243440 is about 32638.0673447433. The cubic root of 1065243440 is about 1021.2912775886.

The spelling of 1065243440 in words is "one billion, sixty-five million, two hundred forty-three thousand, four hundred forty".